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Journal of the Air & Waste Management Association

Ramin Yazdani, Kyuhwan Shim, Zhi Chen, Christy Cheung, Matthew D Summers, Douglas W Williams, Reinhard Seiser, Susan K De Long
No abstract text is available yet for this article.
May 21, 2018: Journal of the Air & Waste Management Association
Michael Mac Kinnon, Zahra Heydarzadeh, Quy Doan, Cuong Ngo, Jeff Reed, Jacob Brouwer
Accurate quantification of methane emissions from the natural gas system is important for establishing greenhouse gas inventories and understanding cause and effect for reducing emissions. Current carbon intensity methods generally assume methane emissions are proportional to gas throughput so that increases in gas consumption yield linear increases in emitted methane. However, emissions sources are diverse and many are not proportional to throughput. Insights into the causal drivers of system methane emissions, and how system-wide changes affect such drivers are required...
May 17, 2018: Journal of the Air & Waste Management Association
Hang Yang, Yongxin Zhang, Chenghang Zheng, Xuecheng Wu, Linghong Chen, Xiang Gao, Joshua S Fu
The pollutant abatement systems are widely applied in the coal-fired power sector and the energy consumption was considered an important part of the auxiliary power. An energy consumption analysis and assessment model of pollutant abatement systems in a power unit was developed based on the dynamic parameters and technology. The energy consumption of pollutant abatement systems in a 1000 MW coal-fired power unit which meet the ultra-low emission limits and the factors of operating parameters including unit load and inlet concentration of pollutants on the operating power were analyzed...
May 10, 2018: Journal of the Air & Waste Management Association
Nezih Kamil Salihoglu
Landfill gas (LFG)-to-energy plants in Turkey were investigated, and the LFG-to-energy plant of a metropolitan municipal landfill was monitored for 3 years. Installed capacities and actual gas engine working hours were determined. An equation was developed to estimate the power capacity for LFG-to-energy plants for a given amount of landfilled waste. Monitoring the actual gas generation rates enabled determination of LFG generation factors for Turkish municipal waste. A significant relationship (R = 0.524, p < 0...
May 8, 2018: Journal of the Air & Waste Management Association
Colin L Y Wong
Implications Statement The flux chamber method is the most widely-used method of measuring fugitive emission rates from area sources. However, extrapolation of a set of individual flux chamber samples to a larger area results in area flux measurement values of unknown accuracy. Quantification of the accuracy of the extrapolation of a set of flux chamber measurements would be beneficial for understanding the confidence that can be placed on the measurement results. Guidance as to the appropriate number of flux chamber measurements to achieve a desired level of accuracy would benefit flux chamber method practitioners...
May 1, 2018: Journal of the Air & Waste Management Association
Thomas Plocoste, Jean-François Dorville, Stéphanie Monjoly, Sandra Jacoby-Koaly, Maïna André
This paper presents a study on ground-level ozone (O3 ), nitrogen oxides (NOx  = NO + NO2 ) concentration and their variabilities in the ambient air of three sites of a tropical archipelago moderately urbanized. Statistical analysis were performed on quite complete (> 80%) five years of measurements (2008-2012). There are few studies on those pollutants and their seasonal behavior in the Caribbean area where pollution level and cities configuration are different from megacities. Analyses are focus on pollutant variations at the scale of the day, the week and the seasons using hourly data...
April 30, 2018: Journal of the Air & Waste Management Association
Meng-Fei Han, Can Wang, Hang Liu
Excessive accumulation of biomass within gas-phase biofilters often results in the deterioration of removal performance. Compared with chemical and biological technologies, physical technologies are more effective in removing biomass and inducing less inhibition of the biofilter performance. This study applied different physical technologies, namely, air sparging, mechanical mixing, and washing with water at various temperature, to remove excess biomass in biofilters treating toluene. Filter pressure drop, removed dry biomass, biofilter performance, and microbial metabolic characteristics were analyzed to evaluate the effectiveness of the methods...
April 30, 2018: Journal of the Air & Waste Management Association
Jinghai Zeng, Min Xing, Min Hou, Glenn C England, Jing Yan
The Beijing Municipal Environmental Protection Bureau (EPB) is considering strengthening the Emission Standard of Air Pollutants for Stationary Gas Turbines, originally published in 2011 (DB11/847-2011), with a focus on reducing nitrogen oxides (NOx) emissions. A feasibility study was conducted to evaluate the current operation of twelve (12) existing combined-cycle gas turbine power plants and the design of two (2) new plants in Beijing and their emission reduction potential, in comparison with a state-of-the-art power plant in California, United States...
April 27, 2018: Journal of the Air & Waste Management Association
Chung-Shin Yuan, Chun-Chung Lu, Hua-Zhen Shen, Tsung-Chang Li
No abstract text is available yet for this article.
April 27, 2018: Journal of the Air & Waste Management Association
Jeongmin Park, Sang-Sup Lee
Conversion of sewage sludge to activated carbon is attractive as an alternative method to ocean dumping for the disposal of sewage sludge. Injection of activated carbon upstream of particulate matter control devices has been suggested as a method to remove elemental mercury from flue gas. Activated carbon was prepared using various activation temperatures and times and was tested for their mercury adsorption efficiency using lab-scale systems. To understand the effect of the physical property of the activated carbon, its mercury adsorption efficiency was investigated as a function of their Brunauer-Emmett-Teller (BET) surface area...
April 25, 2018: Journal of the Air & Waste Management Association
Duguma Erasu, Tesfaye Faye, Amaha Kiros, Abel Balew
The amount of solid waste generated in developing countries is rising from time to time due to economic growth, change in consumer behavior and lifestyles of people. But it is hard to manage and handle the increase of solid waste with existing waste management infrastructure. Thus, the management system of solid waste is very poor and become a serious problem. The main purpose of this study is to quantify the volume of solid waste generated and investigate factors affecting generation and disposal of wastes in the study area...
April 20, 2018: Journal of the Air & Waste Management Association
Dan Mei, Meng Wen, Yuzheng Zhu, Xuemei Xu, Futang Xing
In atmospheric environment, the layout difference of urban buildings has a powerful influence on accelerating or inhibiting the dispersion of particle matters (PM). In industrial cities, buildings of variable heights can obstruct the diffusion of PM from industrial stacks. In this study, PM dispersed within building groups was simulated by Reynolds-averaged Navier-Stokes equations coupled Lagrangian approach. Four typical street building arrangements were used: (a) a low-rise building block with Height/base H/b = 1 (b = 20 m); (b) step-up building layout (H/b = 1, 2, 3, 4); (c) step-down building layout (H/b = 4, 3, 2, 1); (d) high-rise building block (H/b = 5)...
April 20, 2018: Journal of the Air & Waste Management Association
Venkata S V Botlaguduru, Raghava R Kommalapati, Ziaul Huque
The Houston-Galveston-Brazoria (HGB) area of Texas has a history of ozone exceedances and is currently classified under moderate nonattainment status for the 2008 8-hr ozone standard of 75 ppb. The HGB area is characterized by intense solar radiation, high temperature, and humidity, which influence day-to-day variations in ozone concentrations. Long-term air quality trends independent of meteorological influence need to be constructed for ascertaining the effectiveness of air quality management in this area...
April 19, 2018: Journal of the Air & Waste Management Association
Liping Wang, Ruiwei Xu, Bairen Yang, Shaohua Wei, Ningning Yin, Chun Cao
In this study, m-xylene biodegradation was examined in bacteria-water mixed solution and biotrickling filter (BTF) system amended with non-ionic surfactant Tween 80. The mixed bacteria were obtained from the activated sludge of a coking plant through a multi-substrate acclimatization process. High-throughput sequencing analysis revealed that Rhodanobacter sp. was the dominant species among the mixed bacteria. In the bacteria-water mixed solution, the bacterial density increased with increasing Tween 80 concentration...
April 19, 2018: Journal of the Air & Waste Management Association
Weibin Kou, Xumei Chen, Lei Yu, Huibo Gong
Most existing signal timing models are aimed to minimize the total delay and stops at intersections, without considering environmental factors. This paper analyzes the trade-off between vehicle emission and traffic efficiencies on the basis of the field data. First, considering the different operating modes of cruising, acceleration, deceleration, and idling, the field data of emissions and GPS are collected to estimate emission rates for the heavy-duty and light-duty vehicles. Second, multi-objective signal timing optimization model is established based on a genetic algorithm to minimize delay, stops, and emissions...
April 18, 2018: Journal of the Air & Waste Management Association
Zoya Banan, Jeremy M Gernand
Implication The Marcellus shale gas is known as a significant source of criteria pollutants and studies show that the current setback distance in Pennsylvania is not adequate to protect the residents from exceeding the established limits. Even an effective setback distance to meet the annual exposure limit may not be adequate to meet the daily limit. The probability of exceeding the annual limit increases with number of wells per site. We use a probabilistic dispersion model to introduce a technical basis to select appropriate setback distances...
April 18, 2018: Journal of the Air & Waste Management Association
Kwang Yul Lee, Tsatsral Batmunkh, Hung Soo Joo, Kihong Park
The size distribution and chemical components of a fine fraction (<2.5 μm) of road dust collected at urban sites in Korea (Gwangju) and Mongolia (Ulaanbaatar) where distinct urban characteristics exist were measured. A clear bimodal size distribution was observed for the resuspended fine road dust at the urban sites in Korea. The first mode peaked at 100-110 nm, and the second peak was observed at 435-570 nm. Ultrafine mode (~30 nm) was found for the fine road dust at the Mongolia site, which was significantly affected by residential coal/biomass burning...
April 18, 2018: Journal of the Air & Waste Management Association
Lee Weiss, Jesse Thé, Jennifer Winter, Bahram Gharabaghi
Excessive phosphorus loading to inland freshwater lakes around the globe has resulted in nuisance plant growth along the waterfronts, degraded habitat for cold water fisheries, and impaired beaches, marinas and waterfront property. The direct atmospheric deposition of phosphorus can be a significant contributing source to inland lakes. The atmospheric deposition monitoring program for Lake Simcoe, Ontario indicates roughly 20% of the annual total phosphorus load (2010-2014 period) is due to direct atmospheric deposition (both wet and dry deposition) on the lake...
April 18, 2018: Journal of the Air & Waste Management Association
Julia Ekstrom, Louise Bedsworth
No abstract text is available yet for this article.
April 18, 2018: Journal of the Air & Waste Management Association
Guochen Zhang, Xin Zhao, Ping Ning, Danni Yang, Xia Jiang, Wenju Jiang
In this study, MnO2 and pyrolusite were used as the catalysts to prepare modified activated carbon, i.e., AC-Mn and AC-P, respectively, from coals by blending method and steam activation. The BET results indicated that the AC-P had higher surface areas and micropore volumes than the AC-Mn with the same blending ratio. The relative contents of basic functional groups (i.e. C = O, π-π*) on AC-P were slightly lower than those on AC-Mn, while both contained the same main metal species, i.e. MnO. The desulfurization results showed that with 3 wt% of blending ratio, AC-Mn3 and AC-P3 had higher sulfur capacities at 220 and 205 mg/g, respectively, which were much higher than blank one (149...
April 18, 2018: Journal of the Air & Waste Management Association
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